Upper roughing device

ABSTRACT

A device, wherein the last fixing arrangement is made in the form of a toe and a heel rests, one of which is capable of moving towards the second one, thus providing for the clamping and the release of the last, while the starting and the end templets are rigidly secured to the heel and the toe rests, respectively.

[451 a mime Unite States atent 91 Krolikov et al.

[56] References Cited UPPER ROUGHING DEVICE n m w n m .m N n E U m w& T m Z A wt UH a P ."mm Lw S m E m D C T s A M w c T. mfi nm S WNO Md D M E 0058 T 344 S I. 999 MM N HUN t u 163 m a w 455 We n 487 r 073 M0 ,3 nu 222 PA 7, f M madmwo S.IV,.0D-.H var l mmB m N13 k 9 02 ,n pkw l o w5 m4 mm mwm m w wfim KZIHIMVP .l a VU 0. m wmum s wlnnmw [5 6 U 3 3 h tm Kko .k 8 k at s k .k3lV Z r v n s hk kl n m un om 1r.a BPKZP ZL S r m n e v n I M 7 .l

[57] ABSTRACT A device, wherein the last fixing arrangement is made [22] Filed: June 11,1971 I in the form of a toe and a heel rests, one of which is capable of moving towards the second one, thus providing for the clamping and the release of the last, while the starting and the end templets are rigidly R 5 1B 2A3 1 m R m .1 m 2 8 mmm 0 n J mum 2 n 5 m 1 n r n a J e 0 H S N n l C P M P mfv A UIF. lll. 1 2 100 2 555 secured to the heel and the toe rests, respectively.

l2/15.l,34,l7, 77, 77.5

1 Claim, 3 Drawing Fig ures PATENTELMAYZQ I973 SHEET 1 [1F 2 PATENTEBMAYZSIUIS sumzurz UPPER ROUGHING DEVICE The present invention relates to shoe making equipment, and more particularly to a device for roughing the lasting edge of the shoe upper.

Known in the art is a device for roughing a lasted shoe upper, comprising a last fixing arrangement, a roughing tool, a starting and an end templets.

Said roughing tool has an attachment for pressing it to the lasting edge of the upper during the relative straight-line movement of the last and the roughing tool. Rigidly attached to the holder of the roughing tool is a roller which in the course of work moves along the starting and end templets. Said starting and end templets are made so, that when the roller descends the starting templet, the roughing tool sinks onto the last ing edge in a preset point, and as the roller ascends the end templet, the roughing tool is lifted from the lasting edge in a specified point thereof. The device has a meansto hold said roller at a level required to achieve its contact with the starting teinplet. Used as the last fixture in this conventional device is a dowel rigidly secured on which is the last with the upper outsides of a definite size of shoe. The position of the starting and end templets is accurately set during the device adjustment for the given size of shoe. To rough other sizes of shoe upper the device must be stopped and readjusted for this size, i.e. the starting and end templets must be placed in positions securing the sinking and lifting of the roughing tool in the starting and final points, respectively, of the upper surfaces to be roughed.

Thus, in the conventional upper roughing device accuratesinking and lifting of the roughing tool in the specified points of the surface to be worked is possible without readjustment of the device only in the case of roughing shoe uppers of one size, which is an essential disadvantage of this device.

The object of the present invention is to provide a device, wherein the setting of the starting and the end templets into positions securing sinking and lifting of the roughing tool in the specified points of the upper surface to be worked, would be" realized for any size of shoe automatically, without stopping the device.

This and other objects are accomplished due to that the last fixing arrangement is made in the form of a toe and a heel rests, at least one of which is capable of movement toward the other one, its moving mechanism providing for the clamping and the release of the last, while the starting and the end templets are rigidly secured to the toe and the heel rests, respectively.

In the proposed device the templets are set into the appropriate positions automatically as the lasts of different size are being clamped, since the last with the upper is clamped by means of movable heel and toe rests, the templets being rigidly attached to these rests. This enables shoe uppers of any size to be worked in any succession without stopping and readjusting the device.

The invention is further exemplified with an embodiment thereof and the appended drawings, wherein:

FIG. 1 is a general view of the device according to the invention;

FIG. 2 is section IIII in FIG. 1;

FIG. 3 is section III-III in FIG. 2.

The upper roughing device has a stand 1 (FIG. 1) with guides 2, mounted on which is a movable carriage 3 of the last fixture. Rigidly secured on the movable carriage 3 are a front post 4 and a rear post 5, whereon guide bars 6 are immovably fixed.

Located on the guide bars 6 from the side of the rear post is a slide 7 that can move along these guides. Attached to slide 7 by means of a screw joint are a heel rest 8 and starting templets 9. A toe rest 10 and end templets 11 are through a screw joint secured to the front post 4. Slide 7 is linked with the front post 4 by two tension springs 12. Made on slide 7 is an extension 13 (FIG. 2), and on stand 1 there is mounted a stop 14 contacting extension 13 during the idle stroke of carriage 3.

The movable carriage 3 (FIG. 1) is connected to the piston rod 15 of a hydraulic cylinder 16 mounted on stand 1.

Bolted to stand 1 over guides 2 is a bracket 17 (FIG. 2). Immovably secured on bracket 17 is a hollow axle 18.

Inside the hollow axle 18, in bearings 19 there is mounted a shaft 20 whose ends carry pulleys 21 and 22. Pulley 22 is through a vee-belt 23 (FIG. 1) connected with an electric motor 24. Articulated with the hollow axle 18 (FIG. 2) are levers 25 having each two arms 26 and 27 (FIG. 1). At the end of arm 26 of one lever there is made a terminal clamp 28 (FIG. 3) wherein clamped is a hollow casing 29. Placed inside this casing is a sleeve which is capable of axial movement inside this casing. Sleeve 30 is connected to the hollow casing 29 by a key 31. Disposed inside sleeve 30 in a bearing 32 is an arbor 33 having a collar 34. One of the ends of arbor 33 is through splines connected with a pulley 35 which is by means of bearings 36 mounted in the hollow casing 29. Secured on the other end of arbor 33 by a key and a screw joints is the roughing tool 37. At the end of sleeve 30 by means of a stop screw 38 there is fixed a ring 39, articulated on which is a taper roll 40 that contacts the last side surfaces. Arbor 33 serves as a guide for a spring 41, one end of which abuts against collar 34 of arbor 33, and the other one against the end face of pulley 35.

Similar components and mechanisms are secured at the end of the other lever 25. Pulleys 35 of levers 25 are connected by vee belts with pulleys 21 and 22. Fixed on the body of the terminal clamp 28 by a screw joint is a bracket 42, hinged whereon is a roller 43 serving to lift a sink the roughing tool 37.

Abutting against arms 27 (FIG. 1) are compression springs 44, the other ends of which are fixed on stand 1. The compression springs 44 constitute the mechanisms for pressing the roughing tools 37 to the last 45 which is mounted in its fixture.

Secured on stand 1 are stops 46 contacting arms 27 of levers 25, and thus limiting the sinking of arms 26 of these levers with rollers 43. Hence, stops 46 are a means to hold rollers 43 at a level required to achieve contact of rollers 43 with the starting templets 9.

On stand 1 there are mounted hydraulic cylinders 47 whose piston rods 48 contact arms 27 of levers 25. Piston rods 48 are fitted with springs 49.

The device acts as follows. Carriage 3 by means of the hydraulic cylinder 16 moves towards the roughing tools 37 together with last 45 which is clamped by springs 12 between the toe rest 10 and the heel rest 8. As rollers 43 contact the starting templets 9, the roughing tools 37 are lifted and then sunk onto the lasting edge of the upper.

In the process of upper roughing tools 37 are pressed to the upper by springs 44. Since the roughing tools 37 are axially movable, and rollers 40 are kept by springs 41 in constant contact with the last side surfaces, the lasting edge is roughed exactly along the contour of the last bottom.

The roughing tools 37 are lifted from the lasting edge in the toe part of the last due to interaction of rollers 43 with the end templets 11.

When carriage 3 reaches the extreme right position, as in FIG. 1, there works an automatic arrangement (not shown), that sinks piston rods 48 of the hydraulic cylinders 47. Piston rods 48 act on arms 27 of levers 25, and thus raise the roughing tools 37 over the last bottom. In the course of the idle stroke of the carriage extension 13 (FIG. 2) of slide 7 contacts stop 14 before carriage 3 reaches the extreme left position, as in the drawing. Slide 7 together with the heel rest 8 stops, and the toe rest 10 continues moving together with carriage 3, last 45 being so released. The last with the upper canbe replaced by another last and upper of the same or other size of shoe, the process being then resumed.

The device made in accordance with the above description enables shoe uppers of any size to be worked in any succession without stopping and readjusting it.

What we claim is:

1. An upper roughing device, comprising: a toe and a heel rests, wherebetween the last is clamped, one of said rests being capable of moving towards the other rest: a roughing tool, a holder for the roughing tool; a roller rigidly connected to the tool holder; a starting and an end templets, along which said roller moves in the process of roughing, and which are made so that as the roller descends the starting templet the tool sinks onto the lasting edge, and when the roller ascends the end templet said tool is lifted from the lasting edge, said starting and end templets being rigidly secured to the heel and the toe rests, respectively; and a means to hold said roller at a level required for the ascention of this roller on said starting templet. 

1. An upper roughing device, comprising: a toe and a heel rests, wherebetween the last is clamped, one of said rests being capable of moving towards the other rest: a roughing tool, a holder for the roughing tool; a roller rigidly connected to the tool holder; a starting and an end templets, along which said roller moves in the process of roughing, and which are made so that as the roller descends the starting templet the tool sinks onto the lasting edge, and when the roller ascends the end templet said tool is lifted from the lasting edge, said starting and end templets being rigidly secured to the heel and the toe rests, respectively; and a means to hold said roller at a level required for the ascention of this roller on said starting templet. 